FREE SHIPPING ON ORDERS OVER $49

Free Standard Shipping on orders over $49. Transaction total is prior to taxes & after discounts are applied. Due to size and/or weight, certain items bear a shipping surcharge or special handling fee, which will still apply. Savings will automatically reflect in shopping cart with the purchase of qualifying merchandise. Maximum value $75. Valid only on orders shipped within the contiguous 48 U.S. states and to military APO/FPO addresses. Offer not valid on products in the following categories: live pets; canned, fresh or frozen foods; select cat litters. Offer may not be combined with other promotional offers or discounts. Terms and conditions of this offer are subject to change at the sole discretion of PetSmart. Offer valid through February 1, 2018 at 6:30 am EST.

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Use Top Fin pH Decrease in freshwater aquariums to achieve the optimum pH levels. Use pH Increase when water testing reveals a pH lower than the healthy range of 6.5 to 8.0. Measuring cap included. Only at PetSmart.

Instructions: Add to the aquarium and allow water to circulate for at least 20 minutes before re-testing. Allow at least two hours before making additional changes to pH. Excessive rapid pH changes may harm fish. Do not pH by more than 1 whole unit (such ass from 8.0 to 7.0 in 24 hours. For each 10 U.S Gallons (38 L) use 5 mL of solution.

5% Auto Ship - Sign up for Auto Ship and have products conveniently delivered to you at the frequency you choose! Save 5% on your initial order and 5% on recurring orders. Plus enjoy free shipping on orders over $49. Discounts will automatically apply at checkout once the customer has enrolled. Maximum value $150. Offer not valid on gift cards, gift certificates, previous purchases, or charitable donations and may not be valid on all merchandise. Offer may not be combined with other promotional offers or discounts. Terms and conditions of this offer are subject to change at the sole discretion of PetSmart.

Free Standard Shipping on orders over $49 - Transaction total is prior to taxes & after discounts are applied. Due to size and/or weight, certain items bear a shipping surcharge or special handling fee, which will still apply. Savings will automatically reflect in shopping cart with the purchase of qualifying merchandise. Maximum value $75. Valid only on orders shipped within the contiguous 48 U.S. states & to military APO/FPO addresses. Offer not valid on products in the following categories: live pets; canned, fresh or frozen foods; select cat litters. Offer may not be combined with other promotional offers or discounts. Terms & conditions of this offer are subject to change at the sole discretion of PetSmart. Offer valid on petsmart.com through February 28, 2018 @ 6:30 am EST.